Window-lock.



J. S. CURNOW.

WINDOW LOCK.

APPLICATION FILED JAN.20, 1916.

Fig. E.

l i fi WIT/V588.

Patented Nov. 7, 1916.

Fi g. K

INVENTORJ ATTORNEY.

UNTT

JOSEPH S. CURNOW, OF NEWARK, NEIV JERSEY.

WINDOW-1106K.

mosses.

Application filed January 20, 1916.

To all whom it may concern:

Be it known that I, JOSEPH S. CURNow, a citizen of the United States, and a resident of Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in WVindow-Locks, of which the following is a specification.

The objects of this invention are to provide an improved means for looking a window so as to permit it to be partly opened but not so far that anyone could enter from the outside; to provide such a lock which cannot be manipulated from the outside; to prevent the lock from becoming broken or torn from place by violent opening of the window; to permit readily unlocking the window from the inside; to prevent cramping of the screw threads in use; to secure simplicity of construction and operation, and to obtain other advantages and results as may be brought out in the following description.

Referring to the accompanying drawings in which like numerals of reference indicate the same parts throughout the several views, Figure l is an elevation of a window to which my invention has been applied; Fig. 2 is a vertical cross section on line 22 of Fig. 1, and Fig. 3 is asimilar cross section on line 33 of Fig. 1.

In the specific embodiment of the invention illustrated in said drawings, the reference numerals l, 2 indicate the upper and lower sashes respectively of a window, said sashes being vertically slidable and the lower one overlapping on the inside of the upper one as is usual. This leaves the top of the upper rail 3 of the lower sash exposed upon the inside of the window.

Embedded in one side rail 4: of the upper sash is a socket 5 spaced from the bottom of said sash a distance equal to the distance it is intended to permit the window to open while locked. This socket 5 is interiorly screw threaded near its mouth or outer end, but extends to some depth, the inner portion not being threaded as herein shown, although it might be if desired without materially changing the use of the device.

For greater strength and to improve the appearance, aface plate 6 is provided for the socket preferably integral therewith through which screws 7 may be passed to screw it to the front of the sash. It will be understood that this plate is thin enough to pass between the sashes as either one is Specification of Letters Patent.

Patented Nov. 7, 1%16.

Serial No. 73,086.

opened, but is intended to be thick enough so as not to leave more clearance than necessary.

. A stud 8 is provided having screw threads for part of its length adapted to screw into the socket 5, and preferably one end 9 of the stud is large so as to be readily grasped in the fingers and turned, the size being also sufiicient to obtain a very considerable strength. The stud is furthermore long enough so that this end 9 beyond the screw threads will overlie the upper rail of the lower sash a considerable amount so as to positively stop opening the window upon engagement with the sash.

it may be noted in this connection that the face plate 6 is of substantially the thickness of the upper or narrow edge of the sealing lap of the lower rail of the upper sash, so as to just clear the sealing lap of the upper rail of the lower sash. Thus when the stud 8 is screwed into the socket andthe lower sash raised to engage it, the bottom part of the face plate lies between the sashes close to the lower sash. This enables the plate 6 to be firmly secured to the sash without recessing the latter, and furthermore if the face plate became loosened its position between the sashes would prevent it from be ing entirely torn off, as by efiort to jimmy the window.

The other or inner end 10 of the stud is substantially cylindrical and small enough in diameter to be inserted without screwing through the threads in the socket and long enough to position the socket and stud substantially in axial coincidence as the smaller end 10 is inserted therein. By this means, the stud will be held in proper position to cause the threads thereon to properly engage the threads of the socket as soon as the stud is rotated for this purpose, and such engagement will be obtained without any binding of the threaded parts as so often occurs in starting a screw into a threaded part.v

When it is desired to permit the window to open all the way, the stud is unscrewed and taken out, and preferably a pocket 11 is provided for holding the stud while not in use. This pocket is shown secured to the upper rail of the lower sash, and to this end. a foot 12 is provided adapted to lie fiatwise on the top of said sash, and apertured to receive a screw 13 near one end. From the other end of the foot a sleeve 1.4 stands upcured. upon the sash so as to underlie the stud when screwed into thesocketin the upper sash, thus obtaining a stop for the stud and prevent the stud from gouging into the wood of thesash.

Having thus described the invention, What I; claim is,

1. In combination with a window having upperand lower sashes, a socket adapted to be secured to the upper sash said socket hav- 7- inginteriorvscrew threads, a stud threaded to reinovably screw into said socket with an end pro ect1ng to overhe the top of the will be understood that the lower sash in the path of movement thereof and thereby prevent the WlIlClOW from being opened further, and'a pocket fast upon the top. ofthe lower sash for receiving said'stud and protecting the threads thereon when not 111 use.

2. In combination with a window having upper and lower sashes, a socket adapted to be secured to the upper sash said socket having interior screw threads, a stud threaded to removably screw into said socket with an end projecting to overlie the top of the lower sash in the path of movement thereof and thereby preventthe window frombeing opened further; anda pocket fast upon the top of the lower sash for receiving said stud and protecting-the threads thereon when not 7 in use said pocket having a foot upon the top of said lower sash in the'path of-movementof said stud when screw-ed 1n its. socket.

'Josnrn s; ounnow.

Copies of this patent may be obtained for five-cents each, by addressing the Commissioner of Patent's,

Washington, D G? 

